Global varriables

Hello

I have two question. How do i create Global Varriables example:

I player blueprint i create run and staima system. I have a main float varriable called “staima”(min val:0 max - val:100) how do i but this varrible to the User Interface called “Hud” how do i set a progressbar value = staima value (if staima is 46 the progress bar has 46% percent)

I wanna a (hand image) in hud appers in look at a (pickable) object how do i do this 2 things?

Sorry for bad english.

pls ansver